Joshua, your calculation is wrong. A year has 8760 hours, 0.05% of that time the service can be down -> 8760 * 0.0005 = 4.38 hours of downtime.
On Oct 8, 7:52 pm, Joshua Smith <[email protected]> wrote: > Google had a lot of trouble with their original database, known as M/S. It > was responsible for the downtime you heard about. > > So they invented a new database, known as HR, and it has never gone down > since they released it. > > So if you use HR (which is the default for new projects), history suggests > that you will not see outages. > > But be realistic: Everything goes down. Everything. There is no 100% uptime > guarantee. Google is promising 99.95% which means they are OK with 438 hours > of downtime a year. And that's only a soft promise (like most SLAs, your > recourse is negligible if you suffer losses because of their failures). > > I'm quite sure that GAE on HR has better uptime than I could achieve with > anything I could build and manage. > > On Oct 8, 2011, at 11:42 AM, ahmed adel wrote: > > > > > > > > > What do you mean by HR? > > > What I meant is , If I have application hosted in Google Apps Engine , > > will it be affected in the future for example due to data center crash > > like what happened before. > > > We will need this application be available starting from 7 AM to 1 PM > > Cairo time. because of this I am asking about the crash time in Google > > Apps engine. > > > I am asking this because my manager wanna be sure our app won't be > > available for use. (internal and external). > > > Also I heard that Google apps engine was down many times and according > > to this many companies changed the host from Apps engine to another > > PAAS provider. > > > Another reason for my question is I suggested to develop over Google > > Apps Engine for our Customers , but also I told Our management that we > > can not trust Google Apps Engine to do this for now , because as you > > know and correct me if I am wrong (Google don't care much about Apps > > Engine Support) > > > so my question will be now , can I trust Google Apps engine to use it > > for our Clients? in case of yes or no please tell me reasons for your > > answer. > > > On Oct 6, 7:50 pm, Joshua Smith <[email protected]> wrote: > >> Depends how you define "down." > > >> If you only consider HR, it hasn't gone completely down ever. Some bugs > >> have happened (like losing the ability to send mail to gmail addresses > >> with .'s in them) which reduced functionality for HR, and there have been > >> times when you could not update your app. But I don't think HR has ever > >> stopped serving since it was introduced. > > >> M/S has been down lots of times, sometimes for extended periods. But > >> that's irrelevant if you are using HR, which you should be if you care > >> about downtime. > > >> -Joshua > > >> On Oct 6, 2011, at 1:42 PM, ahmed adel wrote: > > >>> I need to know how many time did Google apps engine went down since > >>> launching this service also I need to know for how many hours and what > >>> is the time exactly. > > >>> Also I need to know your opinion about the below. > > >>> We are planning to develop a product over Google apps engine , a big > >>> project actually for our company. > > >>> so should I start using Google apps engine or should I use another > >>> PAAS and if so what is the recommended PAAS. > > >>> thx > > >>> -- > >>> You received this message because you are subscribed to the Google Groups > >>> "Google App Engine" group. > >>> To post to this group, send email to [email protected]. > >>> To unsubscribe from this group, send email to > >>> [email protected]. > >>> For more options, visit this group > >>> athttp://groups.google.com/group/google-appengine?hl=en. > > > -- > > You received this message because you are subscribed to the Google Groups > > "Google App Engine" group. > > To post to this group, send email to [email protected]. > > To unsubscribe from this group, send email to > > [email protected]. > > For more options, visit this group > > athttp://groups.google.com/group/google-appengine?hl=en. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
